WO2004009278A1 - Ring saw drive device and cutting device with ring saw - Google Patents

Abstract

A ring saw drive device for rotatingly driving a ring saw having cutting blades on the outer periphery thereof and a cutting device with the ring saw installed, as an attachment, at the tip of the arm of a shovel system excavator, the drive device wherein endless belts (6, 46, 51) rotatingly driving ring saw bodies (5, 13, 39) are disposed so that a part of the outer peripheral side thereof is wound on a part of the outer periphery of the ring saw bodies (5, 13, 39) to directly drive the ring saw bodies (5, 13, 39) by the endless belts (6, 46, 51) utilizing the outer peripheral side of the peripheral circuit thereof, whereby the ring saw bodies (5, 13, 39) can be deeply inserted into a cut object (32) despite the fact that the endless belts (6, 46, 51) are used and, since a power is transmitted between the endless belts (6, 46, 51) and the ring saw bodies (5, 13, 39) in contact with each other over a wide range, wear at power transmission parts can be reduced and the power can be efficiently transmitted from the endless belts (6, 46, 51) to the ring saw bodies (5, 13, 39).

Description

 Specification

 Technical field of driving device of ring saw and cutting device with ring saw

 5 The present invention provides a driving device for rotating a ring saw, which is an annular saw blade having a cutting blade on the outer periphery, and a ring saw detachably attached to an arm tip of a shovel excavator such as a backhoe. One-piece cutting device. Background art

0 The cutting device with a ring saw that cuts an object to be cut by rotating the ring saw is characterized by extremely low friction loss during cutting and high cutting efficiency. As a driving device for rotating the ring saw, for example, as disclosed in Japanese Utility Model Publication No. 49-31995 of the Japanese Utility Model Publication, internal teeth are provided on the inner peripheral surface of the ring saw body. In general, the ring gear main body is rotationally driven 5 by a driving gear meshing with the internal teeth. In this case, a guide roller is provided on the outer peripheral side of the ring saw body to efficiently transmit the power of the driving device to the ring saw main body by engaging the drive gear with the internal teeth of the ring saw body. The ring roller main body is held between the inside and outside of the body by a guide roller and a driving gear. In addition to such an internal gear type driving device, for example, as disclosed in Japanese Utility Model Publication No. An external tooth type driving device in which external teeth are formed on an outer peripheral surface and a ring gear main body is rotationally driven by a driving gear meshing with the external teeth is also generally known.

However, in both the internal and external toothed drive devices described above, since the teeth are in point or line contact at one point in the power transmission section, the teeth are in contact with each other. This has the disadvantage that the surface pressure increases in the part. Therefore, there is a problem in that the power transmission portion has a large amount of wear and the power cannot be transmitted efficiently. there were.

 In addition, when the above cutting device is attached to the end of a shovel excavator, such as a backhoe, when a large cutting resistance is momentarily generated, there is nothing that absorbs this force. Had a disadvantage that it stopped easily.

 In addition, in the structure in which the ring saw body is driven by the driving gear as described above, there is a problem that foreign matter enters between the ring saw body and the driving gear, and the rotation of the ring saw body stops. . In particular, when the above-mentioned cutting device is attached to a backhoe or the like and used for cutting stone or concrete structures, the rotation of the ring saw body is likely to stop because of penetration of hard foreign matter such as sand and pebbles. Was.

 Therefore, the present invention solves the above-mentioned problems, reduces the wear in the power transmission section, and has excellent transmission efficiency. The rotation of the ring saw is simplified due to the generation of a large cutting resistance at the time of cutting and the penetration of foreign matter. It is an object of the present invention to provide a driving device for a ring saw that does not stop at all times, and a cutting device with the ring saw that includes the driving device and can be attached and detached as an attachment to a shovel excavator. Disclosure of the invention

In order to solve the above-mentioned problems, a ring saw driving device according to the present invention includes a ring saw main body provided with a number of cutting blades along an outer circumference, and a part of the outer circumference side is part of an outer circumference of the ring saw main body. And an endless belt that rotationally drives the ring saw body. That is, the ring saw body is driven by an endless band, and the ring saw body is driven by directly driving the ring saw body on the outer peripheral side of the peripheral circuit of the endless band. It can be inserted deep into objects. In this way, a part of the outer periphery of the endless belt is partially wound around the outer periphery of the ring saw main body to be driven, and the endless band is driven. By contacting the power with the ring saw main body over a wide range, power can be transmitted, so that the surface pressure at the power transmission portion can be reduced. Therefore, it is possible to reduce the wear in the power transmission unit and efficiently transmit the power from the endless belt to the ring saw body.

 In addition, the endless belt that is curved while being wound around the ring saw body is always subjected to a force that tries to be linear when moving around during cutting. However, the ring saw body can be supported so as not to separate from the object to be cut. When a large cutting resistance acts instantaneously during cutting, the endless band retracts, and a function like a cushion that absorbs this force is obtained, so when it is attached to a machine such as a backhoe However, the cutting operation can be continuously performed without stopping the rotation of the ring saw itself.

 Further, by using an endless belt as the endless belt, noise at the time of cutting can be reduced as compared with the case of a chain. In addition, endless belts are lighter in weight than chains and can be operated at higher speeds. Therefore, it is possible to shorten the time required for cutting, which can contribute to improvement of work efficiency. Further, such a high speed provides the torque required for cutting even when the radius of rotation of the ring saw body is reduced, so that it is also suitable for a handy type cutting device that needs to be lightweight and compact. It is. In addition, maintenance is much easier than with chains.

Furthermore, by providing the endless belt with a concave portion or a protrusion that engages with a protrusion or a concave portion on the outer periphery of the ring saw main body, it is possible to engage with the tightness over a wide range. The endless belt is hard to come off during driving. Further, by providing a through hole in the endless belt to avoid interference with the cutting blade of the ring saw body, the end of the cutting blade does not hit the outer peripheral surface of the endless belt, and the endless belt is Deformation and damage can be prevented.Also, even if foreign matter enters between the endless belt and the ring saw body, the foreign matter is not It is removed upward from the through hole of the end belt, and the rotation of the ring saw body does not stop. On the other hand, by using an endless chain as the endless band, even if foreign matter may enter between the endless chain and the ring saw body, the foreign matter is discharged and removed from the gap between the rollers of the endless chain and the ring saw. The rotation of one body can be prevented from stopping. The endless belt is wound around a plurality of rotating bodies, and some of the rotating bodies are driving sprockets or pulleys, which are operatively connected to a hydraulic motor or other prime mover.

 In some cases, the endless belt is wound between two rotating bodies, and at least one of the rotating bodies is a driving sprocket or pulley. Thus, the number of members of the drive device can be reduced, and the weight and size of the drive device can be reduced.

 On the inner peripheral side of the ring saw main body, one or a plurality of inner supports for supporting the ring saw main body from the inside are provided.

 In addition, by making it possible to change the position of a part or the whole of the rotating body along a plane including the endless band orbital moving surface, by changing the position of the rotating body, the endless band becomes a ring saw. The tension of the endless belt can be adjusted according to the diameter of the ring saw body so that it can be wound around the outer surface of one body without any gap.

 Further, the ring saw main body is detachable from a driving device, and a part or all of the inner support body can be changed in position along the direction of the rotation surface of the ring saw main body. By changing the position of the inner support or by changing the positions of the inner support and the rotating body, ring saw bodies having different diameters can be attached. Thus, the inner support can be moved to a position corresponding to the diameter of the ring saw main body, and the ring saw main body can be mounted in a stable state.

Further, a pair of side support members are arranged on both side surfaces of the ring saw body so as to sandwich the ring saw body from both side surfaces. The body can be driven to rotate in a stable state with reduced lateral runout, and the ring saw body comes off the endless band or inner support due to impact when the body of the ring is hit against the object to be cut. Can be prevented.

 More specifically, the side surface support is a guide roller that comes into rolling contact with the side surface of the ring saw main body as the ring saw main body rotates.

 In addition, the cutting device with a ring saw according to the present invention for solving the above-mentioned problem is detachably attached as an attachment to the tip of an arm of a shovel excavator such as a backhoe. It comprises a ring saw body provided with a blade, and an endless belt which is arranged so that a part of the outer peripheral side is wound around a part of the outer circumference of the ring saw body, and rotationally drives the ring saw body. As a result, it can be used with existing excavators and has high versatility. Also, it is economical because it is not necessary to purchase a large-scale dedicated cutting device for cutting stones. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a view showing a driving device for a ring saw according to a first embodiment of the present invention, FIG. 2 is an enlarged view showing a connecting portion between a ring saw main body and an endless belt, and FIG. FIG. 4 is a perspective view showing a use state of the one-piece cutting device, FIG. 4 is a view showing a driving device to which a small-diameter ring saw body is attached, FIG. 5 is a view showing a state in which a side-runout prevention guide roller is attached, FIG. 6 is a view showing a driving device for a ring saw according to a second embodiment of the present invention, FIG. 7 is an enlarged view showing a connecting portion between the ring saw body and the endless chain, and FIG. FIG. 9 is a view showing a driving device to which a ring saw body having a small diameter is attached, FIG. 9 is a view showing a state in which the guide roller is also mounted, and FIG. 10 is a view showing a third embodiment of the present invention. This shows the driving system for the ring saw. FIG. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. A driving device for a ring saw according to a first embodiment of the present invention is, as shown in FIGS. 1 and 2, attached to a side surface (2) of a case (1) of a cutting device with a ring saw, An annular ring-saw body (5) formed with a number of teeth (4) (4) ... along the outer circumference with cutting blades (3) (3), and a ring-saw body (5) driven to rotate Endless belt (6).

 The ring saw body (5) is supported by a pair of inner guide rollers (7) and (8) as an inner support disposed on the inner peripheral side thereof, and is detachably attached to the case (1). Installed. More specifically, the upper side of the inner peripheral surface of the ring saw body (5) is brought into contact with the upper side of the outer peripheral surface of the inner guide rollers (7) and (8) attached to the side surface (2) of the case (1). In this state, the ring saw body (5) is supported so as to be hung on the inner guide rollers (7) and (8).

 The cutting blades (3) (3) are made of, for example, diamond chips, and are detachably attached to the tips of the teeth (4) (4). Therefore, when the sharpness becomes poor, it is economical to regenerate the sharpness only by replacing the cutting blades (3) (3). The cutting blades (3) are not limited to diamond tips, but may be removable metal or ceramic blades. Further, the cutting blades (3) (3)... May be formed by cutting the tips of the teeth (4) (4).

 Each of the inner guide rollers (7) and (8) is rotatably supported by ports (9) and (10) arranged perpendicular to the side surface (2) of the case (1). Therefore, the ring saw body (5) supported by the inner guide rollers (7) and (8) is driven to rotate along the side surface (2) of the case (1). Since the inner guide rollers (7) and (8) are rotatable, the ring body (5) can be smoothly rotated.

The inner guide rollers (7) and (8) consist of two types: fixed inner guide rollers (7) whose position cannot be changed and movable inner guide rollers (8) whose position can be changed. The port (9), which fixes the guide roller (7) inside, is screwed to the side (2) of the case (1). You.

 The port (10) for fixing the movable inner guide roller (8) is screwed near one end of the arm member (11) attached to the side surface (2) of the case (1). . The other end of the arm member (11) is rotatably fixed to the side surface (2) of the case (1) with a screw (12). If the screw (12) is loosened, the arm member (11) is released. At the same time, the movable inner guide roller (8) can be swung along the side surface (2) of the case (1), that is, along the rotation surface direction of the ring saw body (5). Also, after the position of the movable inner guide roller (8) is determined, if the screw (12) is tightened, the movable inner guide roller (8) can be fixed at a target position.

 As described above, since the position of the movable inner guide roller (8) can be arbitrarily changed along the rotation surface direction of the ring saw body (5), the movable inner guide roller (8) and the fixed inner guide roller ( The distance to 7) can be adjusted appropriately, and the ring saw body (5) of various diameters can be mounted in a stable state. For example, as shown in FIG. 4, when replacing the ring saw body (13) with a smaller diameter, the distance between the movable inner guide roller (8) and the fixed inner guide roller (7) is reduced, and the ring saw body ( 13) can be installed.

 The structure for changing the position of the movable inner guide roller (8) is not limited to the structure using the arm member (11). For example, a plurality of bolt holes (not shown) are provided at predetermined positions on the side surface (2) of the case (1), and the movable inner guide roller (8) is supported using one of the port holes according to the situation. The bolt (10) to be screwed may be screwed to the case (1). An elliptical port hole is provided at a predetermined position on the side surface (2) of the case (1), and the movable inner guide roller is moved by using a bolt movable along the elliptical port hole. It is conceivable to attach (8) to the case (1) side (2). Further, the number of movable inner guide rollers (8) is not limited to one. For example, all the inner guide rollers may be movable inner guide rollers.

The endless belt (6) is made of rubber or other resin, or steel, or a combination thereof. Although it is conceivable that the composite material is made of the same composite material, other materials may be used.

 Further, as shown in FIG. 1, the endless belt (6) is arranged so that a part of its outer peripheral side is wound around a part of the outer periphery of the ring saw body (5). In other words, the endless belt (6) is curved while being wound around the ring saw body (5), but when moving around during cutting, the force that tends to be linear is always the direction of arrow A in the figure. To work. By the action of this force, the ring saw body is supported so as not to separate from the object to be cut. Then, when a large cutting resistance acts momentarily during cutting, the endless belt (6) retracts in the direction opposite to the direction of arrow A in the figure so that it can function as a cushion that absorbs this force. It has become. Therefore, even when attached to a machine such as a backhoe, the cutting operation can be performed continuously without stopping the rotation of the ring saw body.

 On the outer peripheral surface of the endless belt (6), a number of projections (41) (41) are provided at regular intervals in the length direction of the belt. On the other hand, on the outer periphery of the ring saw body (5), concave portions (40) (40) are provided between adjacent teeth (4) (4). Then, in the portion where the endless belt (6) is wound around the ring saw body (5), the projections (41), (41) of the endless belt (6) and the recesses (40), (40) of the ring saw body (5) are formed. And have come together. Each projection (41) is provided so as to extend along the width direction of the belt, and has a substantially semicircular cross section.

In addition, the endless belt (6) has through-holes to avoid interference between the portion wound around the outer periphery of the ring saw body (5) and the cutting blades (3) (3) of the ring saw body (5). 42) (42) ... are provided. Each through hole (42) is formed in a square shape when viewed from the belt surface. In other words, the tips of the cutting blades (3) (3) of the ring saw body (5) fit into the through holes (42) (42). Therefore, since the tips of the cutting blades (3) do not hit the outer peripheral surface of the endless belt (6), the endless belt (6) can be prevented from being deformed or damaged. When the endless belt (6) is moved around, the protrusions (41) (41) of the endless belt (6) cause the ring body (5) to engage with the protrusions (41) (41). The recesses (40) (40) ... are pushed and moved, so that the ring saw body (5) rotates. As described above, the endless belt (6) and the ring saw main body (5) come into contact over a wide range to transmit power.

 The combination of the outer periphery of the endless belt (6) and the outer periphery of the ring saw body (5) is not limited to the above configuration. For example, a concave portion is provided on the outer peripheral surface of the endless belt (6), and the endless belt is provided. It is conceivable that the concave portion of (6) and the teeth (4), (4), which are the protrusions of the ring saw main body (5) are engaged with each other. Further, the transmission from the endless belt (6) to the ring saw body (5) is not limited to such engagement, but may be frictional if possible.

 As described above, since the ring saw body (5) is rotated by the endless belt (6), even if foreign matter enters between the ring saw body (5) and the endless belt (6) during the cutting operation, Since the foreign matter is discharged upward through the through holes (42) (42), the rotation of the ring saw main body (5) is not stopped.

 Further, the endless belt (6) is disposed on the outer peripheral side of the ring saw body (5), and is provided in a space inside the inner peripheral surface of the ring saw main body (5). There is no need to arrange pulleys (18), (19), (20) or sprockets for moving the tongue (6) around. When inserting the ring saw body (5) into the object to be cut, these pulleys (18) ( 19) (20) and the like do not interfere with the object to be cut. Therefore, the ring saw body (5) can be inserted deeply into the object to be cut.

 The endless belt (6) is attached to the side (2) of the case (1) above the ring saw body (5), and the three burries (18) (18) ( It is wound between 19) and (20). Instead of the pulleys (18), (19) and (20), a sprocket and other rotating bodies may be used.

Of the three pulleys (18), (19), and (20), the topmost pulley (18) The endless belt (6) is driven by a driving pulley (18) to be linked with a hydraulic motor as a prime mover (not shown) stored in the motor (1). (5) is rotationally driven. Therefore, when the driving bully (18) is rotationally driven by the hydraulic motor, the endless belt (6) rotates along the side surface (2) of the case (1), and the ring saw interlocked with the endless belt (6). One body (5) is rotationally driven.

 The number of boules and other rotating bodies around which the endless belt (6) is wound is not limited to three, but may be two or four or more. The prime mover is not limited to a hydraulic motor, and may be, for example, an electric motor.

 In addition to the driving pulley (18), there are a fixed pulley (19) and a movable pulley (20). The three pulleys (18) (19) (20) are the driving pulley (18). They are arranged in a state that forms a triangle with the vertex at the top.

 In addition, since the endless belt (6) presses the ring saw body (5) from above, the ring saw body (5) is lifted even if the ring saw body (5) is pressed against the object to be cut during the cutting operation. The ring saw body (5) does not easily come off the guide rollers (7) (8).

 The fixed pulley (19) is rotatably fixed by a port (21) screwed vertically to the side surface (2) of the case (1).

 The movable pulley (20) is rotatably mounted by a port (23) near one end of a support (22) mounted on the side surface (2) of the case (1). The other end of the support member (22) is rotatably fixed to the side surface (2) of the case (1) by a screw (24). If the screw (24) is loosened, the support member (22) becomes loose. The movable pulley (20) is rocked together with the support material (22) along the side surface (2) of the case (1) around the screw (24), that is, along the surface including the endless belt (6). Can be. Further, by tightening the screw (24), the support (22) can be fixed to the case (1), and the position of the movable pulley (20) can be fixed.

Since the position of the movable bully (20) can be changed in this way, the endless belt (6) Tension can be adjusted. Therefore, as shown in FIG. 4, for example, when replacing the ring saw body (13) with a smaller diameter, the endless belt (6) is wound around the outer circumferential surface of the ring saw body (13) without gaps. The tension of the endless belt (6) can be adjusted.

 5 The structure for changing the position of the movable pulley (20) is not limited to the structure using the support (22). For example, an elliptical port hole is provided at a predetermined position on the side surface (2) of the case (1), and the movable bull (20) is moved using a bolt movable along the elliptical port hole. It can be attached to the case (1) side (2).

 FIG. 5 shows a pair of side guide rollers as side supports for preventing the ring saw body (5) from shifting in a direction perpendicular to the rotation surface 10 on both sides of the ring saw body (5). (25) The state where (25) ... is arranged is shown.

 On the side surface (2) of the case (1), a pair of plate members (28) (28) connected by a port (26) (26) and a nut (27) (27) ... Are provided so as to sandwich them from both sides, and side guide rollers (25) (25) are rotatably mounted on the opposing surfaces of the plate members (28) (28). More specifically, these side guide rollers (25) (25)

Are mounted along the ring saw body (5) as shown in FIG. 4 so as to abut against the side surfaces of the ring saw body (5).

 By installing the side guide rollers (25) (25) in this way, the ring saw body (5) can be prevented from swaying and can be driven to rotate in a stable state. The impact of the body (5) hitting the object to be cut prevents the ring saw body (5) from coming off the endless belt (8) or the inner guide rollers (7) (8).

 The number, arrangement and mounting structure of the side guide rollers (25) (25) are not limited to the above, and if the ring saw body (5) can be prevented from being displaced in a direction perpendicular to the rotating surface, it is possible to prevent the displacement. good.

Fig. 3 shows the usage of the cutting device (30) with a ring saw to which the above-mentioned drive device is attached. State. The cutting device (30) is attached to a shovel excavator (31) such as a backhoe as an attachment to cut a cutting object (32) such as a stone material or a concrete structure. The object to be cut (32) is not limited to a stone or concrete structure, but may be wood or metal.

 The cutting device (30) is provided with a pair of mounting pieces (33) (33) on the upper surface of the case (1). Each mounting piece (33) (33) has two mounting holes (not shown), and the cutting device (30) uses one of the mounting holes to make the excavator system (31). It is attached to the tip of the arm (34), and is attached to the tip of the work implement cylinder mouthpiece (35) using the other mounting hole. As described above, the cutting device (30) can be attached to the ready-made excavator-based excavator (31) as an attachment, so that the versatility is high. Also, it is economical because it is not necessary to purchase a large-scale dedicated cutting device for cutting stones.

 The use form of the driving device of the ring saw is not limited to the case where the driving device is attached to the attachment of the shovel-based excavator, and for example, it may be used by attaching to a hand-held type cutting device.

 Next, a driving apparatus for a ring saw according to a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, an endless chain (46) is used as an endless belt that rotationally drives the ring saw body (5).

 As shown in FIG. 7, the endless chain (46) is a bush externally fitted to the pins (15) (15) that link the links (14) (14) that constitute the endless chain (46). (16) (16) With the teeth (4) (4)… of the ringso body (5) fitted between them, the endless chain (46) and the teeth of the ringso body (5) (4) ( 4) ... and are interlocked.

When the ring saw body (5) moves around the endless chain (46), the bush (16) (16) of the endless chain (46) fits between the bushes (16) (16). Each tooth (4) (4)… is pushed and rotated. That is, the ring saw body (5) and the endless chain (46) are engaged in a relationship similar to a sprocket and a chain. As described above, since the ring saw body (5) is rotated by the endless chain (46), even if a foreign object enters between the ring saw body (5) and the endless chain (46) during the cutting operation. The foreign matter is discharged and removed from the open portions (17, 17) above the bushes (16, 16), and the rotation of the ring saw body (5) does not stop.

 In this embodiment, sprockets (48), (49), and (50) are used as a rotating body around which the endless chain (46) is wound. However, instead of these sprockets (48), (49), (50), the same pulleys (18), (19), (20) as in the first embodiment, or other rotating bodies may be used.

 An endless chain (46) wound around these sprockets (48), (49), (50) is a ring saw between a fixed sprocket (49) located at the base of the triangle and the movable sprocket (50). It is engaged with the ring saw body (5) while being pushed upward by the upper end of the body (5).

 In this way, the ring saw body (5) is bent so as to bulge upward along the vicinity of the upper end of the outer peripheral surface thereof, and is wound so as to be wound around the upper end of the outer peripheral surface of the ring saw main body (5). Because the endless chain (46) is meshed with more teeth (4) (4) than when the chain is simply stretched straight, the drive sprocket (48) The power from can be efficiently transmitted to the ring saw body (5).

 In addition, since the endless chain (46) and the ring saw body (5) are tightly engaged with each other over a wide range, the endless chain (46) comes off during the rotation drive of the ring saw body (5). hard.

Further, in this embodiment, since the position of the movable sprocket (50) can be changed, the tension of the endless chain (46) can be adjusted as in the first embodiment. Therefore, for example, as shown in FIG. 8, when replacing the ring saw body (13) with a smaller diameter, the endless chain (46) is wound around the outer peripheral surface of the ring saw body (13) so that there is no gap. The tension of the endless chain (46) can be adjusted. As shown in FIG. 9, a pair of side guide rollers (25) (25) as side supports similar to the first embodiment are provided on both sides of the ring saw body (5). The ring saw body (5) is prevented from shifting in a direction perpendicular to the plane of rotation.

 Further, the driving device according to the second embodiment is also attached to the same cutting device (30) as that of the first embodiment. May be.

 In the second embodiment, other configurations and effects are the same as those of the first embodiment. In the drawings, members having the same functions as those of the first embodiment are denoted by the same reference numerals. .

 Hereinafter, a driving apparatus for a ring saw according to a third embodiment of the present invention will be briefly described with reference to FIG. In the figure, (51) is an endless chain for rotating and driving the ring saw body (39), and a plurality of links (52) (52) ... are connected in a ring by pins (53) (53) ... Things. Each link (52) (52) · · · is formed with openings (54) (54) ... on both sides of its side.

 The endless chain (51) is wound between a driving sprocket (58) and a pulley (56). In this way, by winding the endless chain (51) between the two rotating bodies, the number of members of the drive device can be reduced, and the weight and size of the drive device can be reduced.

 In this embodiment, the pulley (56) is used as a rotating body not used for driving. However, a sprocket may be used as in the second embodiment shown in FIG. Conversely, in the second embodiment, a burry may be used instead of the sprockets (49) and (50) as a rotating body not used for driving.

Further, at least one of the rotating bodies of the driving sprocket (58) and the pulley (56) can be changed in position along a surface including the orbital moving surface of the endless chain (51), Adjust the tension of the endless chain (51) by changing the position of the rotating body can do.

 Furthermore, in this embodiment, the cutting blades (61) (61) are detachably attached to the teeth (60) (60) of the ring saw body (39). It is formed into a chip so that it can be replaced together with these bases (63).

 In the third embodiment, an endless belt (6) similar to FIG. 1 may be used instead of the endless chain (51). In the third embodiment, when the endless belt (6) is used, as in the first embodiment shown in FIG. 1, the sprocket (58 ) Is replaced by a pulley.

 Also, a mechanism for driving the driving sprocket (58), a structure for changing the position of one or both of the driving sprocket (58) and the pulley (56), and other configurations and The effects are the same as in the first embodiment, and a detailed description will be omitted.

 The present invention is not limited to the above embodiment, and it goes without saying that many modifications and changes can be made to the above embodiment within the scope of the present invention. Industrial applicability

 INDUSTRIAL APPLICABILITY As described above, the driving device and the cutting device for a ring saw according to the present invention are useful as devices for cutting hard materials such as stone and concrete, and particularly useful as devices attached to construction machines such as backhoes. is there.

Claims

;The scope of the claims  1. A ring saw main body provided with a number of cutting blades along the outer circumference, and an endless end that is arranged so that a part of the outer circumference side is wound around a part of the outer circumference of the ring saw main body, and rotationally drives the ring saw main body. A driving device for a ring saw, comprising a belt.  2. The ring drive according to claim 1, wherein the endless belt is an endless belt. 3. The driving device for a ring saw according to claim 2, wherein the endless belt includes a concave portion or a projection that engages with a projection or a concave portion on an outer periphery of a ring saw main body.  4. The driving device for a ring saw according to any one of claims 2 to 3, wherein the endless belt is provided with a through hole for avoiding interference with a cutting blade of a ring saw body. .  5. The endless belt is an endless chain, and a portion wound around the outer periphery of the ring saw main body is adapted to engage with a plurality of teeth formed along the outer periphery of the ring saw main body. 2. The driving device for a ring saw according to item 1, wherein  6. The endless belt is wound around a plurality of rotating bodies, and some of the rotating bodies are driving sprockets or pulleys, which are operatively connected to a hydraulic motor or other prime mover. Item 6. A driving device for a ring saw according to any one of Items 1 to 5.  7. The driving device for a ring saw according to claim 6, wherein the endless belt is wound around two rotating bodies, and at least one of the rotating bodies is a driving sprocket or a pulley.  8. The method according to any one of claims 1 to 7, wherein an inner peripheral side of the ring saw main body is provided with one or a plurality of inner supports for supporting the ring saw main body from the inside. Ringso's drive. 9. The position of part or all of the rotating body can be changed along the surface including the endless belt orbital moving surface, and the endless is obtained by changing the position of the rotating body. 9. The driving device for a ring saw according to any one of claims 6 to 8, wherein the tension of the belt is adjustable.  10. The ring saw main body is detachable from a driving device, and a part or the whole of the inner support can be changed in position along the rotation surface direction of the ring saw main body. The ring saw body having a different diameter can be attached by changing the position of the inner support or by changing the position of the inner support and the rotating body. Item 10. The driving device for a ring saw according to any one of items 9 to 9.  11. The ring saw according to any one of claims 1 to 10, wherein a pair of side supports are arranged on both sides of the ring saw body so as to sandwich the ring saw body from both sides. One drive.  12. The driving apparatus for a ring saw according to claim 11, wherein the side surface support is a guide roller that comes into rolling contact with a side surface of the ring saw main body as the ring saw main body rotates.  13 3. A cutting device that is detachably attached as an attachment to the tip of an arm of a shovel excavator such as a backhoe, and has a ring saw body equipped with a number of cutting blades along the outer circumference, and a part of the outer circumference side. A cutting device with a ring saw, wherein the cutting device is provided so as to be wound around a part of the outer periphery of a ring saw main body, and includes an endless belt that rotationally drives the ring saw main body.  14. The cutting device with a ring saw according to claim 13, wherein the endless belt is an endless belt. 15. The endless belt according to claim 14, wherein the endless belt is provided with a concave portion or a projection that engages with a projection or a concave portion on the outer periphery of a ring saw body. 16. In the endless chain, a part wound around the outer periphery of the ring saw main body includes a plurality of teeth formed along the outer periphery of the ring saw main body. A cutting device with a ring saw according to claim 13 adapted to engage: